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ASP.NET MVC - ValidateAntiSpamAtrribute

/ Published in: C#
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  1. public class ValidateAntiSpamAttribute : ActionFilterAttribute
  2. 	{
  3. 		public string ErrorMessage { get; set; }
  4.  
  5. 		public ValidateAntiSpamAttribute() { }
  6. 		public ValidateAntiSpamAttribute(string errorMessage)
  7. 		{
  8. 			this.ErrorMessage = errorMessage;
  9. 		}
  10.  
  11. 		public override void OnActionExecuting(ActionExecutingContext filterContext)
  12. 		{
  13. 			string sixtimesnine = (string)filterContext.HttpContext.Request.Form["sixtimesnine"];
  14. 			string fourtytwo = (string)filterContext.HttpContext.Request.Form["fourtytwo"];
  15.  
  16. 			if (string.IsNullOrEmpty(sixtimesnine) ||
  17. 				string.IsNullOrEmpty(fourtytwo) ||
  18. 				sixtimesnine != fourtytwo)
  19. 			{
  20. 				filterContext.Controller.ViewData.ModelState.AddModelError("Spam", this.ErrorMessage);
  21. 			}
  22. 			else
  23. 			{
  24. 				// Merely for unit testing puproses - we need to make sure that the above clause
  25. 				// was *not* run.
  26. 				filterContext.Controller.ViewData["filter"] = "passed";
  27. 			}
  28. 			base.OnActionExecuting(filterContext);
  29. 		}
  30. 	}

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